1252879291 has 4 divisors (see below), whose sum is σ = 1293294784. Its totient is φ = 1212463800.

The previous prime is 1252879289. The next prime is 1252879319. The reversal of 1252879291 is 1929782521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1252879291 - 2¹ = 1252879289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1252879211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20207700 + ... + 20207761.

It is an arithmetic number, because the mean of its divisors is an integer number (323323696).

Almost surely, 2^1252879291 is an apocalyptic number.

1252879291 is a deficient number, since it is larger than the sum of its proper divisors (40415493).

1252879291 is an equidigital number, since it uses as much as digits as its factorization.

1252879291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40415492.

The product of its digits is 181440, while the sum is 46.

The square root of 1252879291 is about 35396.0349615603. The cubic root of 1252879291 is about 1078.0438100266.

It can be divided in two parts, 12528 and 79291, that added together give a palindrome (91819).

The spelling of 1252879291 in words is "one billion, two hundred fifty-two million, eight hundred seventy-nine thousand, two hundred ninety-one".